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| author |   Mike Leach <mike.leach@linaro.org> | 2019-11-04 11:12:43 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-04 21:57:54 +0100 |
| commit | 75198a7d4c0c3ee75f81ee2dbe908d9082ab4206 (patch) | |
| tree | 8e1d5615f82b212eaa19b77a3cf41b742129accc /drivers/hwtracing | |
| parent | coresight: etm4x: Fix input validation for sysfs. (diff) | |
| download | linux-dev-75198a7d4c0c3ee75f81ee2dbe908d9082ab4206.tar.xz linux-dev-75198a7d4c0c3ee75f81ee2dbe908d9082ab4206.zip | |
coresight: etm4x: Add missing API to set EL match on address filters
TRCACATRn registers have match bits for secure and non-secure exception
levels which are not accessible by the sysfs API.
This adds a new sysfs parameter to enable this - addr_exlevel_s_ns.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20191104181251.26732-7-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index cc8156318018..97a33cf98797 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -1233,6 +1233,47 @@ static ssize_t addr_context_store(struct device *dev, } static DEVICE_ATTR_RW(addr_context); +static ssize_t addr_exlevel_s_ns_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etmv4_config *config = &drvdata->config; + + spin_lock(&drvdata->spinlock); + idx = config->addr_idx; + val = BMVAL(config->addr_acc[idx], 14, 8); + spin_unlock(&drvdata->spinlock); + return scnprintf(buf, PAGE_SIZE, "%#lx\n", val); +} + +static ssize_t addr_exlevel_s_ns_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + u8 idx; + unsigned long val; + struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct etmv4_config *config = &drvdata->config; + + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (val & ~((GENMASK(14, 8) >> 8))) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + idx = config->addr_idx; + /* clear Exlevel_ns & Exlevel_s bits[14:12, 11:8], bit[15] is res0 */ + config->addr_acc[idx] &= ~(GENMASK(14, 8)); + config->addr_acc[idx] |= (val << 8); + spin_unlock(&drvdata->spinlock); + return size; +} +static DEVICE_ATTR_RW(addr_exlevel_s_ns); + static ssize_t seq_idx_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -2038,6 +2079,7 @@ static struct attribute *coresight_etmv4_attrs[] = { &dev_attr_addr_stop.attr, &dev_attr_addr_ctxtype.attr, &dev_attr_addr_context.attr, + &dev_attr_addr_exlevel_s_ns.attr, &dev_attr_seq_idx.attr, &dev_attr_seq_state.attr, &dev_attr_seq_event.attr, |